Adult Tiger Man: A Case of Dermatomyositis Associated With Thymoma.

Aksu, Ayşegül; Şin, Cihan; Yilmaz, Burçak · Clin Nucl Med · 2022

case_report · Level V

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Abstract

The scan demonstrated multiple linear and patchy hypermetabolic lesions in skeletal muscles, mimicking the coat of a tiger, and was referred to as "a tiger man" sign. A 38-year-old man was admitted to our hospital with weakness, shortness of breath, and muscle pain. A CT scan showed a mass in the anterior mediastinum. 18F-FDG PET/CT was performed to evaluate the mass with a preliminary diagnosis of thymoma; heterogeneous 18F-FDG uptake in the mediastinal mass and tiger man findings in skeletal muscles were observed in PET/CT images.

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